Panel with fixture retaining features and modular assemblies made using multiple panels

1. An apparatus, comprising:

plural panels, each panel comprising a rectangular shape and:

a top surface, a bottom surface, and a side surface spanning the top and bottom surfaces;

plural upper retaining slots, each upper retaining slot recessed into the panel through the top surface, extending parallel to the top surface, opening through the side surface in at least one location, and comprising a dovetail shape;

plural bottom retaining slots, each bottom retaining slot recessed into the panel through the bottom surface, extending parallel to the bottom surface, opening through the side surface in at least one location, and comprising the dovetail shape;

a connector assembly configured to secure two panels of the plural panels together so that axial projections of the upper retaining slots of each panel are not blocked by the other panel, the connector assembly comprising a complementary dovetail shape configured to cooperate with the dovetail shape;

a plurality of spaced apart first studs that secure to the bottom surface of a first panel of the two panels and that form a first line;

a plurality of spaced apart second studs that secure to the bottom surface of a second panel of the two panels and that form a second line parallel to the first line; and

an intermediate component configured to receive the plurality of spaced apart first studs and the plurality of spaced apart second studs and hold them in place;

wherein the intermediate component comprises a straight first slot and a straight second slot parallel to the first slot, each slot extending along a full length of the intermediate component and opening through an end surface of the intermediate component; and

wherein the first slot is configured to receive and interlock with the plurality of spaced apart first studs only by positioning the first line end-to-end with the first slot and moving the first line into the first slot, and the second slot is configured to receive and interlock with the plurality of spaced apart second studs only by positioning the second line end-to-end with the second slot and moving the second line into the second slot.

2. The apparatus of claim 1 , wherein each panel comprises a straight side surface of the side surface and wherein the connector assembly orients the straight side surfaces so that respective long axes of the straight side surfaces are parallel to each other.

3. The apparatus of claim 2 , wherein the top surfaces of the two panels are disposed at ninety (90) degrees to each other.

4. The apparatus of claim 1 , wherein the intermediate component comprises:

a first surface that directly supports the bottom surface of the first panel when the intermediate component receives the plurality of spaced apart first studs; and

a second surface that directly supports the bottom surface of the second panel when the intermediate component receives the plurality of spaced apart second studs.

5. The apparatus of claim 1 , each panel further comprising at least one dog hole extending through the panel from the top surface to the bottom surface, wherein the at least one dog hole is unthreaded.